Re: Middleware for serving static files

[James Tucker <jftucker@gmail.com>]

Magnus,

Does this do what you want?

def call(env)
  [ 200, {'Content-Type' => 'text/plain'}, [env['HTTP_HOST']] ]
end

use Rack::Static, :urls => Dir['*'].map { |f| "/#{f}" }
run self

This does cache the allowed list on boot.

If not, a patch to support what you want is reasonably trivial, however, one has to be careful to not open up the system to discovery attacks, file traversals, and timing issues. It's not quite as simple as tacking an || File.exists?(path) onto the end of the can_serve method.

Cheers,

James